Reaming or scraping tool



March 17; 1925.

F. J. PALMER,

REAMING OR SCRAPING TOOL 2 Sheets-Sheet 1 Filed Aug. 4. 1921 March 17, 1-925: 1,530,057

F. J. PALMER REAMING OR SCRAPI NNNN 0L Filed Aug. 4. 1921 2 sheets-sheet 2 Patented Mar. 17, 1925.

UNITED STATES ram) J. PALMER, or ELKI-IART, INDIANA.

REAMING OR SGRAPING TOOL.

Application filed. August 4, 1921. Serial No. 489,895.

To all whom it may concern: Be it known that I, FRED J. PALMER, a citizen of the United States, residingin the city of Elkhart, county of Elkhart, Indiana, have invented certain new and useful Improvements in a Beaming or Scraping Tool, of which the following is a specification.

This invention relates to devices for scraping or reaming valve seats and the faceo'f the valve for internal combustion engines, or the like.

An object of my invention is to produce a valve and valve seat reaming or refaoing tool for internal combustion engines, or the like, in which the cutting blade is adjustable and provided with a plurality of sets of cutting edges. Another object of the invention is the production of a tool of the character described and means in combination therewith, whereby either the .valve seat in the engine or the face of the valve itself may be refaced while the valve is mounted in'the device. Other objects of my invention are mentioned and described therein.

, The preferred embodiment of my invention is illustrated in the accompanying drawings in which Figure 1 is a section taken through a. fragment of an internal combustion engine cylinder showing my invention applied thereto for refacing the engine cylinder valve seat; Fig. 2 is a top plan view of my invention including a ratchet wrench and frame or carrier therefor, Fig. 3 is a top plan view of a valve;.Fig. 1 is a side elevation of an adapter element; Fig. 5 isa plan view of the adapter element; Fig. 6 is a side elevation of the blade holder with blades mounted therein; Fig. 7 is a bottom plan view of the holder shown in Fig. 6; Fig. 8 is a section taken on the line 8-8 of Fig.7 Fig. 9 is a section taken on the line 9-9 of Fig. 7 and Fig. 10 is a view in elevation of one of the cutting blades enlarged.

Similar numerals of reference indicate like parts throughout the several views on the drawings.

Referring to the drawings in detail, the numeral 1 indicates a fragment of a suitable type of internal combustion engine cylinder provided with a valve seat 2 adapted to coact with the poppet valve 3, as is well known in the art, the valve being provided with the usual valve stem 4 slidably mounted in the guide bore 5. The engine cylinder is provided with an opening 6 which is threaded to receive a screw plugnot shown-to close the cylinder above the valve, as is well known in the art, through which opening my improved tool may be inserted for refacing the seat 2. i

The numeral 7 indicates the blade holder consisting of a. hollow cone-like element comprising the rim 8, the hub 9 and the web 10 connecting said rim and hub. The holder hub 9 may be vertically bored at 11 to receive the valve stem 4, and the holder web 10 may have a plurality or series of openings 12, 12 arranged around the hub 9; 9 radially thereof, each of which openings may terminate at its bottom end at a socket 13 formed in the holder hub 9, said socket being arranged axially of a bore orchamber 14 (Fig. 1) formed in the holder rim 8.

The numerals 15, 15 indicate a plurality of cutting blades carried by the holder 7 and inclined to the axis thereof, the lower end of each blade being removably arranged in the socket 13, and its upper end remove so ably arranged within the bore 14, each or which blades may be secured in the holder by a taper pin 16 removably mounted in the holder rim and penetrating one of the two blade shank apertures 17 formed therein at right angles and in the same plane. Each blade 15 maybe provided with a plurality of sets of cutting edges 18, 18 and 19, 19, respectively, which are adapted for arrangement in the opening 12 in the holder web, said blade edges, when thus operatively positioned, extending through and beyond said openingvand on both sides thereof, to enable the use of either of the blade cutting edges.

When one set of the cutting edges of the I blade 15, for example edges 18, 18, become dulled by use, the other set of cutting edges may be brought into operative position by rotation of the blade through ninety degrces, for which purpose the socket 13 and the bore 14: may be cylindrically formed. The outer end of each blade 15 may be transversely slotted at 20 to enable engagement by a screw driver, or other suitable tool, to effect rotation of the blade in its mount after disengagement of the pin 16 therefrom.

The top surface of the valve 3 is usually provided with aplurality of recesses 21, 21 to receive a spanner wrench for rotating the valve for grinding same in when pitted, as is well known. Some valves have a transverse slot 22 formed therein to serve the same purpose, which also is well known. In practice, the valve stem 4: is thrust through the holder hub bore 11 and the face of the valve brought into contact with the upper cutting edges of the blades, whereby the valve face may be resurfaced by rotation ofthe valve in any manner. When the valve seat 2 in the engine cylinder is to be resurfaced the lower set of cutting edges of the blades 15 are brought into engagement therewith and rotation of the holder 7 effected in. any manner.

My improved reamer may be mounted in a frame 23 consisting of the three legs 2%, 25 and 26, effecting a Ii-shaped structure in top plan view, each of which legs has an. angular prong 27 adapted to engage beneath the rim 8- of the holder 7 for clamping said frame to the holder 7 by a clamping screw 28 threaded through said frame 23, the point of which screw is adapted to engage the ratchet wrench 29, the latter being seated upon the valve 3. The wrench 29 may have lugs: 30', 30 adapted to engage in the valve recesses 21, 21, and a handleySl, which wrench may be any suitable type of ratchet wrench. In: the event the valve 3 is provided with the slot 22, I provide an adapter element or plate 32 which: is provided with the recesses 33, 33, adapted to receive the wrench lugs 30, said plate being provided also with tongue 34 adapted to engage the valve slot 22, for effecting rotation of the valve.

The point of the clamping screw 28 may engage in a recess 35 formed in the upper face of the wrench 29 to prevent displacement of the frame 23 and to maintain said frame in position on the holder 7 and said wrench.

The adjustment of the clampingscrew' 28 may be regulated in relation to its engagement with the wrench 29, but ordinarily the adjustment is loose enough to permit the rotation of the valve 3 against the cutting edges of the blades 15 by operation of said wrench. But a tighter adjustment of the screw 28 will set the valve 3 rigidly against the blades 15, whereby, when the wrench 29, the valve 3 and holder 7 are assembled, as in Fig. 1, operation of the wrench will effect rotation of the holder 7 and the valve 3 in unison, thereby resurfacing the engine valve seat2.

I claim:

1. A tool of the character described consisting of a hollow conical blade holder comprising a hub, a rim and a web connecting the rim and hub, said web being provided with a plurality of openings extending therearound, and said hub being bored to receive the valve stem of a valve; and a blade rigidly mounted in each of said holder web openings, said blade having oppositely disposed cutting edges which are adapted to cut a valve face when a valve is arranged within the holder or a valve seat in an engine cylinder with the opposite blade cutting ed e.

2 A tool of the character described consisting of a hollow blade holder provided with a centrally bored section and a plurality of radially extending blade openings arranged around said bored section, the bore of said bored section being adapted to receive and sustain the valve stem of a valve, a cutting blade rig-idly mounted ineach of said blade openings and inclined to the axis of said holder bore,one of said bl-adeshav ing a cutting edge adapted to engage and dress a valve facewhen the valve is arranged within said holder and the stem thereof is arranged within said holder bore, and another blade having a cutting edge adapted to engage and dress a valve seat in an engine cylinder.

3. A tool of the character described consisting of a hollow conical blade holder adapted for rotation and provided with a central integral hub section, such hub being provided with a plurality of blade sockets arranged therearound; and a circular series of blades rigidly mounted in said holder, adjustable therein and inclined to" the axis thereof, the lower ends ofsaid blades being carried in said huh blade sockets.

4:. A tool of thecharacter described consisting of a hollow conical blade holder comprising a hub, a rim and a webconnecting the rim and hub, said web being provided with a plurality of openings extending therearound, and saidhub being bored to receive a valve stem; a blade mounted in each of said holder openings, said blade being provided with a plurality of cutting edges, of which blade cutting edges one is adapted to be disposed in an inoperative position when the other is operatively positioned; and means to enablemovement of'saidl blade to bring any one of the blade cutting edges into operative position.

5. A device of the character described" consisting of a hollow cone shaped holder element adaptedt-obe arranged in: avalv'e' seat of an internal combustion engineand to con.- tain a valve therein, said holder element having a hub at its apex which is bored to receive the stem of said valve; av plurality of cutting blades removably mounted in said holder in a series around the hub thereof, for resurfacing the valve seat in the engine each of said blades being provided with opcylinder. positely disposed cutting edges; ratchet In testimony whereof I have hereunto af- 10 means for rotating the Valve to resurface fixed my signature this 1st, day of Aug,

5 the face thereof; and clamping means asso- 1921. ciated with the ratchet means to effect simultaneous rotation of the holder and valve FRED J. PALMER. 

